Avago Technologies SAS 9300-4i Host Bus Adapter User Manual

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LSI Corporation

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SAS-3 Integrated RAID Solution User Guide
November 2012

Chapter 2: Overview of Integrated RAID Mirrored Volumes

Operation of Mirrored Volumes

You can configure an Integrated Mirroring + Striping volume with an even number of disks, ranging from a minimum

of four disks to a maximum of ten disks. The following figure shows the logical view and physical view of an Integrated
Mirroring + Striping volume with four mirrored disks. The firmware writes each mirrored stripe to a disk and mirrors it
to an adjacent disk. RAID 10 is another term for this type of configuration.

Figure 4 Integrated Mirroring + Striping with Four Disks

The LSI SAS-3 BIOS configuration utility (SAS-3 BIOS CU) enables you to create mirrored volumes during initial setup

and to reconfigure them in response to hardware failures or changes in the environment.

CAUTION The SAS3 BIOS CU deletes all existing data from the disks drives when you select them to use for a
mirrored volume.

3K\VLFDO9LHZ

/RJLFDO9LHZ

-IRRORED

This manual is related to the following products:

SAS 9300-4i4e Host Bus Adapter SAS 9300-8i Host Bus Adapter SAS 9311-4i4e Host Bus Adapter SAS 9311-8i Host Bus Adapter